gitlab-ci: Simplify some job definitions by extending more similar jobs

v2:
* Preserve setting NIR_VALIDATE=0 for all arm64_* jobs
* Preserve setting DEQP_SKIPS=deqp-default-skips.txt for
  arm64_a306_gles2 jobs

Reviewed-by: Eric Engestrom <eric.engestrom@intel.com> # v1
Reviewed-by: Eric Anholt <eric@anholt.net>
1 file changed